EP 1355408 A2 20031022 - Audio band conducted emissions suppresssion on power feeders
Title (en)
Audio band conducted emissions suppresssion on power feeders
Title (de)
Unterdrückung der audio-band-übertragenen Aussendungen auf Leistungszufuhrgeräte
Title (fr)
Suppression des émissions rayonnées sur une bande audio pour des alimentateurs de puissance
Publication
Application
Priority
US 12440502 A 20020418
Abstract (en)
A switch-mode power converter that powers the fan or blower unit in a communication system is used to suppress the audio band noise, thereby eliminating any need for additional passive or active filters used in the prior art. The frequency response of a switch-mode DC/DC converter is set by a control loop. By modifying the feedback amplifier compensation network in the control loop such that the frequency control loop bandwidth of the converter is substantially less than the AC load of the fans or blowers, the invention eliminates the need for additional filtering beyond that inherent in the power converter.
IPC 1-7
IPC 8 full level
H02M 3/335 (2006.01)
CPC (source: EP US)
H02M 3/33507 (2013.01 - EP US); H02M 1/44 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 1355408 A2 20031022; EP 1355408 A3 20060301; US 2003198063 A1 20031023; US 6643148 B1 20031104
DOCDB simple family (application)
EP 03290977 A 20030418; US 12440502 A 20020418